Margin bar for duplicating machines



March 1, 1932. L. .1. SAUER MARGIN BAR FOR DUPLICTING MACHINES FiledJune lO, 1929 4 Sheets-Sheet l March l, 1932. L, SAUER 1,847,266

MARGIN BAR FOR DUPLICATING MACHINES Filed Jux@ l0, 1929 4 Sheets-Sheet 2@wf ,MMM

##orngys.

March l, 1932. L. .1. SAUER 1,847,266

MARGIN BAR FOR DUPLICATING MACHINES Filed June l0, 1929 4 Sheets-Sheet 524M, WLMf/QM March 1, 1932. L 1 SAUER MARGIN BAR FOR DUPLICATINGMACHINES Filed June l0, 1929 4 Sheets-Sheet 4 ,En/enfer.'

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Patented Mar. l, 1932 LOUIS J'. SAITER, 0F OAK PARK, ILLINOIS, ASSIGNORT0 CHARLES CHICAGO, ILLINOIS irEDsr-ATES PATENT o1-FICE JOY, sn.,r or

MARGIN BAR FOR DUPLICATING MAOHINES Application filed .Tune 10, 1929.serial No. 369,624.

This invention relates to margin bars for duplicating machines and moreparticularly to automatically controlled margin bars adapted for use onthat class of machines 3 commonly known as hectographs or duplicatingmachines similar to that shown and des ribed in my copending`application,

Serial No. 349,876, wherein is provided a flat printing bed over whichis stretched a long and comparatively thin gelatinized band or apron,the ends being secured to and wound upon rolls or spools adjacent theends ofthe printing bed so that by rotating the spools successivesections of the band may be eX- i; posed in operative positionon thebed.

This type of machine is provided with a platen carriage having asuitable platen roller which is adapted to travel over the printing bedfor impressing the original or the s) copy sheets on the gelatinizedband which reeeives the impression from the original sheet and transfersit to the copy sheet.

In positioning the original or copy sheets on the gelatinizecl band itis necessary to provide aV suitable margin stop bar in order that thedesired uniform margin may be obtained on the copies and that the papermay be accurately located with relation to the car,- riage and feedrolls.

One of the objects of my invention is to provide an automaticallycontrolled margin bar which will provide an effective paper locatingmeans and which will not interfere in any way ith the operation of thecars riage or the movement of the platen roller.

Another object is to provide an automatic adjustable marO'in bar inwhich the width of the margin may be predetermined and accuratelyadjusted.

4P Another object is to provide a margin bar automatically controlled bythe movement of the carriage and one which is at all times under thecontrol of the operator through the platen roller handle.

5; Still another object is the provision of a margin bar which may bemanually moved away from the edge of the printingsurface to allorYaccess to the gelatinized roll and which is securely held in either itsnormal or 1.5.@ moved position.

:lustrated in Fig. l, the margin bar and cooperating parts being shownin their normal position when the carriage is moved to the yrear of themachine;

Fig. 3 is a sectional view taken substantially on the lineB-S ofFig.2,-showing the margin bar raised to the same position'shown in Fig. l inwhich the carriage is inthe eX- treme'forward position; f

Fig. 4 is a front elevation of the margin control adjusting means; 7D'

Fig. 5 is a sectional view taken on the line 5 5 of Fig. 2, the marginbar being in its normal lowered position;

Fig. 6 is a fragmentary side elevation partially in section of themargin bar operating 7, means with the carriage at theY extreme frontand the platen roller lowered in printing position; and

Fig. 7 is a view similar toy Fig. 6 showing the position of the partswhen the platen roller is raised and the carriage is not at the extremefront of the machine.

Referring now more particularly to the drawings in detail, my inventionas illustratedcomprises a duplicating machine having the side frames land 2 on which is supported the bed plate 3. A gelatinized band 4, whichis of a length much greater than that of the printing bed, is wound uponsuitable spools or spindles adjacent the ends of the bed, one of whichis shown at 6. By turning one of the spools, successive sections of tlegelatinized band may be moved to eX- posed position in either directionas desired so that when several impressions are on the band at one timeany one of them may be moved into position so that copies may beproduced in the desired position on the paper and provided with asuitable margin.

The carriage which is arranged to be moved over the printing bedcomprises a substantially rectangular frame 7 having suitable bearings,not shown, for allowing it to be shifted back and forth over thegelatinized printing surface. The arrangement is such that the carriagemay be moved over the printing bed or raised to permit inspection orremoval of the gelatinized band.

The platen roller 8 is mounted on the yoke 9 which is, in turn,pivotally mounted on a suitable bearing rod 10 which is supported on thecarriage frame. The spring 11 tends to force the yoke to the raisedportion shown in Fig. 1. The yoke may be moved to operative printingposition, see Fig. 6, by means of the handle 12. 1t is normally held inprinting position by a spring lock and may be released at any time bymeans of the lock handle 13. The lock is not shownv as it forms no partof the present invention.

The usual gripping or pressure roller 14 is mounted on the carriage asshown adjacent the platen roller and in a position to grip the paperwhen it is inserted between the platen roller and the gripping rollerand the handle V12 pushed forward to move the platen roller to printingposition. The platen roller in its downward movement presses thegripping roller rearwardly and carries the paper which is.k insertedbetween the rollers down against the gelatinized band, the paper beingguided during insertion by the guide plate 15 having suitable movableguides thereon to adjust the lateral position of the paper. The grippingroller 14 is mounted in adjustable sliding bearings 15a and adjusted bymeans of the nuts 16, the springs 17 holding it normally in forwardposition.

When the carriage is in its extreme forward positionra'nd the platenroller raised as in Fig. 1 the paper is inserted between the rollersuntil it is stopped by the raised back 18 of the adjustable margin bar19, the position of this bar determining the margin.

The margin bar extends across and adj acent the front edge of theprinting bed, its ends being rigidly secured to the down turned,slidably mounted members 20 and 21, one of these members being providedat each end of the bar.

The margin har is mounted for slidable movement on the movable yoke orsupporting member 22, which is, in turn, mounted for longitudinalmovement between the side frames 1 and 2 and extends beneath andadjacent the under side of the printing bed. The yoke 22 comprises theside rack bars 23 and 24 which are rigidly connected together by thecross bar 25.

Each of the rack bars 23 and 24 is provided with inwardly extending pins26 engaging in the slots 2T which are provided in the downturned marginbar end members 2O and 21. The slots are positioned to a low the freeoblique movement of the margin bar 19 from the position shown in Fig. 5to that in Figs. 1 and 3.

Directly under the cross bar 25 of the yoke 22 is the transverse pinionshaft 28, mounted for free rotation in the side frames 1 and 2, andhaving integral therewith the pinion 29 engaging the rack 23 and thepinion 30 engaging the rack 24. p

rEhe front end of the yoke is supported on the pins 31 which engage thefront notches 32 in the rack members` 22 and 24 when the yoke is innormal operating position, thus preventing longitudinal movement. T heracks are held in engagement with the pinions by means of the rollers 33on the side frames.

y 1n order to allow removal or inspection of the gelatiniZed roll, therack members are provided withV the notches 34 in which are the pins 31when the yoke is moved to its forward position.

1n moving the margin bar away from the edge of the printing bed, thefront end o'f the yoke. is raised until the pins 31 are disengaged fromthe notches 32. It is then moved forward until in the position shown indotted lines in Fig.V 5' when the pins 31 will be engaged in the notches34, the pinions 29 and 30 serving to keep the yoke in alignment.

rllhe yokek is guided and prevented from lateral displacement by thelugs 35 and 36 on the side frames.

in order that the margin bar may be retained in parallel alignment withthe front edge of the printing surface during its oblique movement,equalizing levers 37 are fulcrumed on the yokecross bar 25 and providedwith the equalizing gearteeth 38, the opposite ends of the levers beingconnected to the downturned ends 20 and 21 of the margin bar by means ofthe links 39 whereby, when the equalizing levers are operated, themargin bar will be moved obliquely on the pins 26.

The operation of the margin bar is accomplished through the T-shaped camlever 40 aivoted at 41 on the yoke rack bar and adjacent the sideframe 1. The lever 40 is provided with a pin42 engaging in the slot 43in the lever 44 which isv pivoted on the depending arm 45 of the yokemember 22. rlhe upper end of the lever is connected to one of theequalizing levers through the link 46, the lever 47 pivoted at 48 on thecross bar 25, and the link 49. 1t is obvious that with thisconstruction, when the T-shaped lever is r cked the margin bar will bemoved obliquely from the position shown in Fifi'. 5 to that in Figs. 1and 3 or vice versa,

1n order that the margin bar may be moved automatically relative to theposition of the platen roller and carriage, the'T-shaped lever 40 isprovided with a cam surface 50 arranged to engage the roller 51 on themember 52 which is adjustably pivoted on the yoke supporting rod 10 onthe carriage.

The member 52 is normally held in the the position shown in Fi. 1 bymeans ofthe spring 'and the sliding plug 54,the strength of the spring53 being suflicient to hold the margin bar in the raised position shown.In this position the original or copy sheet may be inserted between theplaten and pressure rollers and against the margin bar 19. The platenroller is then lowered by means of the handle 12, the pin 54a on theyoke 9 engaging the arm 55 and moving the member 52 to compress thespring 53. During this movement the arm iengages the cam surface of theT-shaped lever 40 (subsequent to the gripping of the sheetl between therollers 8 and 14.-) moving the leverto the positionl shown in Figs. 6and 7 and lowering the margin bar to the position shown in Fig.l 5. Theparts are then in the position shown in Fig. 6, with the' carriage inits extreme forward position and when the carriage is moved towards therear ofthe machine as shown in Fig. 7, the platen roller may be raisedor lowered without affecting the position of the margin bar. When thecarriage is moved toward the front of the machine with the platen rollerraised, the pin 54a will be out of engagement with the ar1n55 and theroller 51 will be in a position to engage the cam surface to raise themargin bar to the position shown in Fig. 1. If the carriage is moved tothe front of the machine while the platen roller is lowered against theprinting surface, the pin 54a will be in engagement with the, arm 55holding the member 52 in inoperative position.

lVhen the platen roller is in the raised position the member 52 restsagainst the stop 57 which may be accurately adjustedby means of thethumb screw 58 which is held rigidly in position by means of the spring59 engaging the notches 60.

By adjusting this thumb screw, the normal position of the member 52 willbe varied to change the limit of movement of the margin bar withrelation to. the movement of the platen roller. j

Having thus described my invention, what I claim and ldesire to secureby Letters Patent is:

1. A duplicating machine comprising a framework, a printing bedsupported thereby7 a carriage shiftable over said bed, a platen rolleron said carriage, a yoke manually movable on said framework, and amargin bar mounted for angular movement on said yoke for adjustmentrelative to said roller.

2. A duplicating machine comprising a framework, a printing bedsupported thereby, a carriage shiftable over said bed, a platen rolleron said carriage, a yoke manually movable on said framework, a marginbar movey ably mounted on said yoke for adjustment relative to saidroller, and adjustable means for limiting the movement of said marginbar.

3. A duplicating machine comprising a. framework, a printing bedsupported thereby, a carriage shiftable over said bed, a platen roller:on said carriage, a yoke manually movable on said framework, a marginbar movably `mounted on said yoke for adjustment relative to saidroller, and adjustable means on said carriage for limiting the movementof said margin bar.

il. A duplicating machine comprising a framework, a printing bedsupportedthereby, avcarriage shiftable over said bed, a plat-en' rolleron said carriage, a yoke manually movable on said framework, a marginbar movably mounted on said yokefor adjustment relative to saidroller,.and adjustable means on said carriage for limiting the movementof said margin bar, saidmeans being arranged to hold said margin bar atthe limit of its movement.v g

5. A duplicating machine comprising a framework, a printing bedsupported thereby, a carriage shiftable back and forth over said bed, aplaten roller shiftable on said carriage, a yoke manually movable onsaid frame-V work, a margin bar movably mounted on said yoke forautomatic movement relative to said printing bed, and means on saidcarriagefor moving said margin bar whenv said platen roller is moved. Yy

6. A duplicating machine comprisinga framework, a printing bedsupportedthere-vr by, a carriage shiftable back and forth over said bed,a platen roller shiftable-on said carriage, a yoke manually movable onsaidV framework, a margin bar movably mountedv on said yoke forautomatic movement rela-tive to said printing bed, means on saidcarriage for moving said margin bar when said platen roller is moved,and means on said carriage for limiting the movementl of said marginbar.

7. A -duplicating machine comprising a framework, a printing bedsupported thereby, a carriage shiftableback and forth over said bed, aplaten roller shiftable on said carriage, a yoke manually movablerelative to said bed, a margin bar on said yoke and movprinting bed,means on said carriage for moving said margin barwhen said platen rolleris moved, means on said carriage for limiting the movement of saidmargin bar, a cam lever on said yokefor controlling the movement of saidmargin bar, and adjustable means on said carriage and cooperating withsaid cam lever forv controlling and limiting the movement of said camlever.

9. In a duplicating machine the combination with a printing bed, of acarriage shiftable back and forth over said bed, a platen roller on saidcarriage and shiftable to and from said bed, a margin bar supportingmember manually movable relative to said bed, a margin bar on saidsupporting member and movable relative to said platen roller, equalizingmeans on said supporting member for retaining the alignment of saidmargin bar during its movement, a cam lever cooperating with saidequalizing meansto move said margin bar, and means on said carriage andcooperating' with said cam lever to move said margin bar relative tosaid platen roller.

l0.- In a duplicating machine the combination with a printing bed, of acarriage shiftable back and forth over said bed, a platen roller on saidcarriage and shiftable to and from said bed, a margin bar supportingmember movable relative to said bed, a

margin bar on said supporting member and movable relative thereto, a camlever on said supporting member for moving said margin bar, atransmission means between said cam lever and said margin bar andlcomprising a compound leverage, and adjustable means on said carriagefor controlling and limiting the movement of said cam lever. i

l1. In a duplicating machine the combination with a printing bed, ofmargin bar supporting means movable relative to said bed and comprisingrack members, pinions cooperating to hold said rack members in movablealignment, means for retaining said supporting member in itspredetermined position relative to said bed, a movable margin barnormally in alignment with the printing surface, and means forautomatically raising said margin bar during the normal operation of themachine. Y

l2. In a duplicating machine the combination with a printing bed, ofmargin bar supporting means movable longitudinally relative to said bed,a movable margin bar on said supporting means, means for retaining saidsupporting member in a predetermined position relative to said bed, amovable margin bar normally in alignment with the printing surface,'andmeans for automatically raising said margin bar during the normaloperation of the machine.

13. A duplicating machine comprising a framework, a printing bedsupported thereby, a carriage shiftable back and forth over said bed, aplaten roller on said carriage and shiftable relative to said bed, aplaten yoke for shifting said platen roller, a margin bar adjacent saidprinting bed and shiftable relative thereto, means independent of saidcarriage for shifting said margin bar, and adjustable means on saidcarriage and cooperatingk with said platen yoke and said margin barshifting means for controlling and limiting the movement of said marginbar. Y

14. A duplicating machine comprising a framework a. printing bedsupported thereby, a carriage shiftable-back and forth over said bed, aplaten roller on said carriage and shiftable to and from said bed, aplaten yoke for shifting said platen roller, a margin bar adjacent saidprinting bed and shiftable relative thereto, means independent of saidcarriage for shifting said margin bar, spring means on said carriage formoving said margin bar in one direction, and positive means on saidcarriage for moving said margin bar in the opposite direction.

15. A. duplicating machine comprising a bed over which the gelatine rollpasses, a carriage movable back and forth over said bed, a platen rollermovably mounted on said carriage, a handle for moving the carriage overthe bed and controlling the position of the platen roller, a margin barmovable from operative position to a position to permit the platenroller to be lowered, and means controlled by the carriage in itsmovement over the bed for moving the margin bar to operative positionand controlled by the movement of the handle in lowering the platenroller for moving the margin bar out of the way of the platen roller.

16. A duplicating machine comprising a bed over which the gelatine rollpasses, a carriage movable back and forth over said bed, a platen rollermovably mounted on said carriage, a handle for moving the carriage overthe bed and controlling the position of the platen roller, a margin barmovable from operative position to a position to permit the platenroller to be lowered, and means controlled by the carriage in itsmovement over the bed for `moving the margin bar to operative positionand controlled by the movement-of the handle in lowering the platenroller for moving the margin bar out of the way of the platen roller,and means for adjustably determining the operative position of themargin bar.

17. A duplicating machine comprising aV bed over which the gelatine rollpasses, a carriage movable back and forth over said bed, a platen rollermovably mounted on said carriage, a handle for moving the carriage overthe bed and controlling the position of the platen roller, a margin barmovable from operative position to a position to permit the platenroller to be lowered, comprising a rock member adjacent the side of thebed, and transmission from said rock member to said margin bar actingequally on both ends of the bar.

18. A duplicating machine of the character described comprising a basehaving a printing surface thereon, a margin bar adjacent the end of andsubstantially in alignment with said surface and normally disconnectedfrom said carriage, a carriage arranged to travel over said surface, anoperating means for said carriage, -and means cooperating between saidmargin bar and said operating means to move said margin bar over saidprint-ing surface.

19. A duplicating machine of the character described comprising a basehaving a4 printing surface thereon, a margin bar adjacent the end of andsubstantially in alignment with said surface and normally disconnectedfrom said carriage, a carriage ar'- ranged to travel over said surface,an operating means for said carriage, and means co operating betweensaid margin bar and said operating means to move said margin harangularly over said printing surface.

20. A duplicating machine comprising a base having a printing surface, acarriage shiftable over said surface, a platen roller on said carriage,a margin bar movably mounted adjacent the end of and substantially inalignment with said surface,'and a single operating means forcontrolling the operation of said carriage and the movement 0f saidmargin bar relative to said platen roller.

21. A duplicating` machine comprising a base having a. printing surface,a carriage shiftable over said surfacefa platen roller shiftable on saidcarriage, a margin bar adjacent the end of and substantially inalignment with said surface and shiftable relative to said roller andsaid surface and a single operating means for controlling all of saidshifting operations.l

22. A duplicating machine comprising a hase having a printing surface, acarriage shiftable over said surface, a platen roller shiftable on saidcarriage, a margin bar adjacent the end of and substantially inalignment with said surface and shiftable relative to said roller andsaid surface and a handle for controlling all of said shaftingoperations by aback and forth movement in a single plane.

In witness whereof, I have hereunto sub# scribed my name.

LOUIS J. SAUER.

